1.split from 脱离，从...分离
例句：The more mutations in the gene, the faster that species has evolved since it split from the common ancestor.
从共同的祖先那里分离之后，这种基因中的变异越多，说明这个物种的进化就越快drf;h5gpOzxc8nSDaWk。

2.tie the knot 结婚
例句：My other suggestion is that you be engaged for six months or more before you actually tie the knot.
我的另一个建议就是在你决定结婚前，你起码得订婚六个月，甚至更多q.5(IR7WPrM。